Siegfried iiansing



Patented Dec. 23, 1890.

WITNESSES:

ATTOH/VE UNITED STATES PATENT OFFICE.

SIEGFRIED IIANSING, OF NEW YORK, N. Y.

PRESSURE-BAR FOR UPRIGHT PIANOS.

SPECIFICATION forming part of Letters Patent No. $43,277, dated December 23, 1890.

Application filed October 3, 1890. Serial K173661955. (No model.)

To all whom it may concern.-

Be it known that I, SIEGFRIED HANSING, of the city, county, and State of New York, a citizen of the German Empire, have invented certain new and useful Improvements in Pressure-Bars for Upright Pianos, of which the following is a specification.

For the purpose of preventing the vibration and sounding of that part of the strings of a piano which are extended beyond the stringbridge, a pressure-bar is used that is arranged between the string-bridge and tuning-pins, so that thereby the sounding; portions of the strings are separated from the non-sounding portions of the same. This pressure-bar is screwed down to the wrest-plank and prevents the vibrating of the ends of the strings, so that the sound of the same is made stronger and fuller. The stronger the pressure-bar is pressed against the ends of the strings the more perfect is its position thereon. Heretofore the pressure-bar was attached by means of screws to the wrest-plank in such a manner that by the pressure of the pressure-bar on the strings and the screws the reliable connee-tion between the pressure-bar and wrestplank was obtained, and thereby the vibrating of the ends of the strings beyond the stringbridge almost entirely prevented.

The object of my invention is to improve the connection of the pressure-bar with the string-frame in such amanner that the pressure-bar is supported in a rigid and reliable position on the strings; and the invention consists of the combination, with a metallicstring frame provided with raised lugs cast integral therewith, of a pressure-bar that extends over the strings, it being supported on the lugs and attached by fastening-screws to the string-frame, as will be fully described hereinafter, and finally pointed out in the claims.

In the accompanying drawings, Figure 1 represents a front elevation of my improved pressure-bars for upright pianos, and Figs. 2 and 3 are vertical transverse sections of the same, respectively, on lines 2 2 and 3 3, Fig. 1.

Similar letters of reference indicate correspending parts.

Referring to the drawings, A represents the string-frame of an upright piano, and B the strings, which are stretched over the sounding-board bridge 0 and over the string-bridge D, and which are firmly pressed down above the string-bridge by means of a pressure-bar E, which is attached by screws e to the stringbridge and wrest-plank, so that the ends of the strings are tightly strained and the vibration and sounding of the same prevented. For the purpose of supporting the pressurebar E rightly in position, it is supported on lugs a a, that are cast integralwith the stringframe A, said lugs having concave faces that support the convex under side of the pressure-bar E. The lugs a support the pressurebar rigidly in position and impart the required degree of stiffness to the same, so that it presses firmly on the strings and improves thereby the tone of the same and the quality of the piano.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with the string-frame and string-bridge of a piano, said string-frame being provided with lugs that are cast integral therewith, of a pressure-bar that is supported on said lugs and extended over the strings above the string-bridge, and screws for attaching said pressure-bar to the stringframe, substantially as set forth.

2. The combination, with a string-frame havinglugs made integral therewith; said lugs being providedwith concave faces, of a stringbridge attached to said string-frame, strings stretched over the same, and a pressure-bar, having a convex under side, placed transversely across the strings above the stringbridge, and screws for attaching the pressurebar to the string-frame, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

SIEGFRIED HANSING. lVitnesses:

PAUL GoEPEL, W. REIMHERR. 

